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<<All sorts of goofy things fireplaces can do to trick and aggravate the most experienced Fp service tech, right S/P? You seem to know the joy I speak of.
HTH,
Doc
>>

Oh my yes! Combustion problems are frequently rotten to figure out because of a lot of possible variables and the difficulty of examining the system.

If I had a competetor I hated, I'd send all those tough combustion problems over to them to figure out. Instead, people tend to refer people to ME! Who have I teed off do you think?

I posted a thread a couple of weeks ago where I was hired as a consultant to help bird dog combustion problems in a condo building. The nice thing about that one was that I got to critique the work other people had done without actually having to fix anything myself! Good work if you can get it.

This is a good thread, and people had some good ideas I hadn't thought of myself.

The bottom line on most combustion problems is that IF the equipment is installed the way it is specified in the installation manual, it will work in most cases. Comparing the way it was actually done with how it should have been done is a very powerfull approach to solving these problems.

After talking to the company (Empire) they determined the logset stand for the rear, is having probs pulling the flame away from the gen/therm on long vertical chimney runs.. They are sending a new rear logset..There are 50 of these in the same area, this is the only one having probs...

Replaced the entire guts on the thing, from another new one..Still doing it, of course.

He plugged off the intake on the chimney, still nothing. With the generator disconnected from the gas valve, the voltage never goes past 125mv. When reconnected to the gas valve it immediatly drops to around 90mv.

PILOT t-couple never goes above 10 mv. Flame, hood etc was adjusted many differant ways to try and achieve a better mv rading. Nothing. Removed Generator and swept my turbo-torch across the generator a few times, it easily gets up past 400mv.